<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  
</head>

<body>
  <div id="app">
    <p>顺序： {{ message }}</p>
    <p>逆序： {{ reverseMessage }}</p>
  </div>


  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.0"></script>
  <script>
      var vm = new Vue({
      el: '#app',
      data: {
        message: 'Hello'
      },
      computed: {
        // 计算属性的getter
        reverseMessage: function () {
          // `this`指向vm实例
          return this.message.split('').reverse().join('')
        }
      }
    })
   

  </script>

</body>

</html>